_random_choice renamed to random_choice_without_replacement and elaborated
_random_choice renamed to random_choice_without_replacement and elaborated

Maybe put in utilities.py

QuantEcon/QuantEcon.py,gxxjjj/QuantEcon.py,jviada/QuantEcon.py,gxxjjj/QuantEcon.py,jviada/QuantEcon.py,oyamad/QuantEcon.py,andybrnr/QuantEcon.py,oyamad/QuantEcon.py,agutieda/QuantEcon.py,agutieda/QuantEcon.py,QuantEcon/QuantEcon.py,andybrnr/QuantEcon.py